1681025711 has 4 divisors (see below), whose sum is σ = 1684395000. Its totient is φ = 1677656424.

The previous prime is 1681025669. The next prime is 1681025729. The reversal of 1681025711 is 1175201861.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1681025711 - 2¹⁴ = 1681009327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681025761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1683896 + ... + 1684893.

It is an arithmetic number, because the mean of its divisors is an integer number (421098750).

Almost surely, 2^1681025711 is an apocalyptic number.

1681025711 is a deficient number, since it is larger than the sum of its proper divisors (3369289).

1681025711 is an equidigital number, since it uses as much as digits as its factorization.

1681025711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3369288.

The product of its (nonzero) digits is 3360, while the sum is 32.

The square root of 1681025711 is about 41000.3135475816. The cubic root of 1681025711 is about 1189.0262757025.

The spelling of 1681025711 in words is "one billion, six hundred eighty-one million, twenty-five thousand, seven hundred eleven".